--- title: "GST/HST Registration: When You Must Register" url: https://www.everstonecpa.com/blog/gst-hst-registration-guide-small-business description: "When a Canadian small business has to register for GST/HST, what the small supplier threshold means, how to register. See why some register voluntarily." type: guide updated: 2026-10-12 summary: "You must register for GST/HST once your revenue exceeds $30,000 in any single quarter or over four consecutive quarters. Registering voluntarily before you reach that threshold lets you claim input tax credits to recover the GST/HST you pay on business purchases. Your filing frequency — monthly, quarterly or annual — depends mostly on your revenue." faq_count: 8 publisher: EverStone CPA Inc., a Chartered Professional Accountant firm registered with CPA British Columbia and CPA Alberta service_area: British Columbia, Alberta, Ontario and Manitoba language: en-CA contact: info@everstonecpa.com · https://www.everstonecpa.com/book-online --- [Home](https://www.everstonecpa.com/) [Blog](https://www.everstonecpa.com/blog) GST/HST Registration: When Small Businesses Must Register Tax # GST/HST registration: *when your business must register* By EverStone CPA · Updated August 2026 · 7 min read **Quick answer:** You must register for GST/HST once your revenue exceeds $30,000 in any single quarter or over four consecutive quarters. Registering voluntarily before you reach that threshold lets you claim input tax credits to recover the GST/HST you pay on business purchases. Your filing frequency — monthly, quarterly or annual — depends mostly on your revenue. The sales tax follows your customer’s province. **Rather have a CPA handle this?** A CPA at EverStone replies with a straight answer and a fixed fee for your situation. [Get My Fixed Quote →](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form) ## Key takeaways - You must register once your revenue exceeds $30,000 in any four consecutive quarters (or a single quarter). - Registering voluntarily before you have to lets you claim input tax credits on your expenses. - Input tax credits let you recover the GST/HST you pay on business purchases. - Filing frequency (monthly, quarterly or annual) depends mostly on your revenue. GST/HST confuses more small business owners than any other tax, usually because nobody explains the one number that matters: **$30,000**. Get that threshold and a couple of rules right and the rest falls into place. Here’s the plain-English version. ## The $30,000 threshold You **must** register for GST/HST once your taxable revenue passes **$30,000**. Specifically, that’s over **any four consecutive calendar quarters**, or in a **single** calendar quarter. Below that, you’re a “small supplier” and registration is optional. Related: [How the RT program account number is built](https://www.everstonecpa.com/blog/business-number-program-accounts-canada). **Watch the timing:** if you blow past $30,000 in a single quarter, you’re required to register immediately — you don’t get to wait for the year to end. Track your rolling revenue so the threshold doesn’t surprise you. Selling through Amazon, Etsy or a similar platform does not remove the obligation. See the guide to [marketplace GST/HST rules](https://www.everstonecpa.com/blog/ecommerce-marketplace-facilitator-rules-canada). [our GST/HST tool](https://www.everstonecpa.com/gst-hst-calculator) helps you see the tax on any amount. **Close to the $30,000 threshold, or past it?** We register you, set the right reporting period and file the returns, as part of bookkeeping from $325 a month. [Get a quote](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form). [Get My Fixed Quote](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form) ## Should you register before you have to? Often, yes, because of **input tax credits** (below). If you’re spending money on equipment, software, inventory or professional fees to get started, voluntary registration lets you recover the GST/HST on those costs. It’s also worth it if your customers are registered businesses, since they simply claim back the tax you charge them. The trade-off: once registered, you must charge tax, file returns and stay compliant even in slow periods. For a genuinely tiny side business with few expenses, staying a small supplier keeps life simpler. Work out your own date with the [GST/HST due date calculator](https://www.everstonecpa.com/gst-filing-deadlines#deadline-checker). Not sure how this applies to you? Every corporation’s situation is different. Send an enquiry to a CPA and get a straight answer, plus a fixed quote before any work starts. [Send an Enquiry →](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form) [See fixed fees](https://www.everstonecpa.com/pricing) ## Input tax credits: recovering what you pay This is the mechanic that makes GST/HST net out fairly. You collect tax from customers, you pay tax on business purchases, and you remit only the **difference**. Those recoverable amounts are input tax credits (ITCs). If your ITCs exceed the tax you collected — common in a startup or investment year — you get a **refund**. Clean bookkeeping is what makes ITCs easy to claim, which is why we bundle it into our [bookkeeping service](https://www.everstonecpa.com/accounting-services). ## Which tax applies where you operate The regime depends on your province: **HST** (a single combined rate) in Ontario and Atlantic Canada; **GST plus a separate PST** in BC and Saskatchewan; **GST plus RST** in Manitoba; and **GST only** in Alberta and the territories. A remote CPA files the right one for wherever your business operates. Which of those rates actually applies to a given sale is decided by the [place-of-supply rules](https://www.everstonecpa.com/blog/gst-hst-place-of-supply-rules-canada), not by where your office is, and sales to customers outside Canada follow the separate [export and non-resident rules](https://www.everstonecpa.com/blog/gst-hst-on-exports-and-non-residents). ## Filing frequency How often you file depends mostly on revenue — smaller businesses typically file **annually**, mid-size **quarterly**, and large filers **monthly**. You can elect to file more often (useful if you’re regularly in a refund position). We set you up on the schedule that fits and handle it through our online GST/HST filing service. ## The bottom line Register when you cross $30,000 — sooner if you have real expenses to recover — claim your input tax credits, and file on the right schedule for your province. Done properly, GST/HST is just bookkeeping hygiene. Done late, it’s penalties and back-filing. If you’re unsure where you stand, a quick consultation sorts it out. Sources - [CRA Guide RC4022 — General Information for GST/HST Registrants](https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4022.html) - [Canada Revenue Agency — GST/HST](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses.html) - [Canada Revenue Agency — GST/HST for businesses](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses.html) - [Canada Revenue Agency — Business number registration](https://www.canada.ca/en/services/taxes/business-registration.html) This article is general information for Canadian business owners and is current as of July 2026. It is not tax, legal or accounting advice, and it does not create a client relationship. Tax rules change and your situation is unique, so please [speak with a CPA](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form) before acting on anything here. About this article **EverStone CPA** Prepared and reviewed by a Chartered Professional Accountant at EverStone CPA, a CPA firm working with small and midsized businesses in BC, Alberta, Ontario and Manitoba. [About the firm →](https://www.everstonecpa.com/about) · [Send an enquiry →](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form) Registering in a province we do not sit in changes nothing about how we file for you. We handle GST/HST registration for owners across BC, including [Vancouver](https://www.everstonecpa.com/accountant-vancouver). Once registered you are on a filing cycle. See [what that cycle looks like and when returns are due](https://www.everstonecpa.com/gst-filing-deadlines). Once registered, small businesses can choose the Quick Method; the [Quick Method vs regular calculator](https://www.everstonecpa.com/quick-method-vs-regular-calculator) shows which remits less. ### Related articles [work out the GST on an amount](https://www.everstonecpa.com/gst-hst-calculator) Online GST/HST filing → [Bookkeeping & filing →](https://www.everstonecpa.com/accounting-services) [Is the Quick Method worth it? →](https://www.everstonecpa.com/blog/gst-hst-quick-method-canada) [GST/HST instalments for annual filers →](https://www.everstonecpa.com/blog/gst-hst-instalments-annual-filers-canada) [If the CRA says you should already be registered →](https://www.everstonecpa.com/cra-letter-gst-registration)[Ask a CPA one question, free →](https://www.everstonecpa.com/quick-question)[Late GST filing penalties in Canada: what missing the deadline actually costs →](https://www.everstonecpa.com/blog/late-gst-filing-penalties-canada)[How to Change Your GST/HST Filing Frequency →](https://www.everstonecpa.com/blog/change-gst-hst-filing-frequency) FAQ ## Frequently asked questions **When do I have to register for GST/HST?** You must register once your taxable revenue exceeds $30,000 over any four consecutive calendar quarters, or in a single quarter. Until then you’re a small supplier and registration is optional. Once you cross the threshold, registration and charging tax become mandatory. **Should I register for GST/HST voluntarily?** Often, yes. Registering before you’re required lets you claim input tax credits — recovering the GST/HST you pay on business expenses and startup costs. It’s especially worthwhile if you have significant expenses or your customers are themselves registered businesses. **What is an input tax credit?** An input tax credit (ITC) lets you recover the GST/HST you pay on purchases used in your business — equipment, software, supplies, professional fees. You subtract your ITCs from the tax you collected, and remit only the difference (or claim a refund if ITCs exceed tax collected). **How often do I file GST/HST returns?** It depends on revenue. Smaller businesses can usually file annually; mid-size file quarterly; large filers file monthly. You can also elect a more frequent schedule. Annual filers file and pay three months after their fiscal year-end; a sole proprietor with a December year-end files by June 15, with any balance due April 30. **What actually counts toward the $30,000 threshold?** Your taxable revenue, measured over four consecutive calendar quarters or within a single quarter. It is revenue, not profit, so expenses do not reduce it. Because the test rolls forward rather than resetting with your fiscal year, tracking it month by month is what stops the threshold from arriving as a surprise in the middle of a strong quarter. **What happens if I register for GST/HST late?** You are still liable for the tax you should have collected. Once the threshold is crossed the obligation starts whether or not you registered, so CRA can assess GST/HST on past sales along with interest and penalties, and going back to customers to recover it after the fact is often impractical. Back-filing also means reconstructing input tax credits from old records. **Which sales tax applies if my customer is in another province?** Generally the one that applies where your customer is. HST applies in Ontario and Atlantic Canada, GST plus a separate PST in BC and Saskatchewan, GST plus RST in Manitoba, and GST only in Alberta and the territories. Selling across provincial lines means charging the rate applicable to the customer’s location, which is worth setting up correctly in your invoicing from the start. **How do I open a GST account for a small business?** Register for a GST/HST program account under your business number — online through Business Registration Online or My Business Account, or by phone. The CRA issues the account number, usually ending RT0001, when it opens. [Ask about your case →](https://www.everstonecpa.com/quick-question) ## GST/HST giving you a headache? Tell us your sales over the last four quarters. A CPA replies by email within one business day with whether to register now and a fixed fee. [Get My Fixed Quote](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form)[Book a Paid Advice Call](https://www.everstonecpa.com/advice-call) Working with a CPA online is ordinary now: see [Vancouver small-business accounting, handled remotely](https://www.everstonecpa.com/accountant-vancouver). [← GST/HST Quick Method: can it save you money?](https://www.everstonecpa.com/blog/gst-hst-quick-method-canada) [The section 156 election: nil consideration between related corporations →](https://www.everstonecpa.com/blog/gst-hst-section-156-election-related-corporations) More on this subject: [every GST/HST guide](https://www.everstonecpa.com/gst-hst-hub). ## Have a question about this? Ask it free through [the quick-question form](https://www.everstonecpa.com/quick-question) and a CPA replies by email within one business day. For something that needs a proper look, a one-off **Advice Call** is a paid 45-minute session with a Chartered Professional Accountant: $225 plus GST, booked by email or phone with a secure payment link. It is credited against your first invoice if you become a client within 60 days. Looking for an accountant to take this on rather than an answer? [Send an enquiry](https://www.everstonecpa.com/book-online?service=monthly#enquiry-form). Registering for GST is half the job in British Columbia; [the second registration a BC business usually needs](https://www.everstonecpa.com/blog/gst-pst-filing-fraser-valley-businesses) covers the other half. [Ask a Free Question](https://www.everstonecpa.com/quick-question) [Book a Paid Advice Call](https://www.everstonecpa.com/advice-call) Email info@everstonecpa.com ★★★★★ “…He is very knowledgeable and has saved me tons in taxes by restructuring my group of companies — the best accountant I've worked with in the last 10 years, after switching from three different firms.” Matt Hildebrandt · Google review --- Source: https://www.everstonecpa.com/blog/gst-hst-registration-guide-small-business Prices: https://www.everstonecpa.com/pricing · Contact: info@everstonecpa.com · https://www.everstonecpa.com/book-online